Emergency door lock having alarm means



April 1, 1969 I E, C, POLLAK ET Al. 3,435,643

EMERGENCY DOOR LOCK HAVING ALARM MEANS Filed Marh 21, 1956 A MERR April l, 1969 E, C, POLLAK ETAL.. 3,435,643

' EMERGENCY DOOR LOCK HAVING AL-ARM MEANS Filed Maron 21, 196e United States Patent Office 3,435,643 EMERGENCY DOOR LOCK HAVING ALARM MEANS Edward C. Pollak, 21 Thimble Lane, Hicksville, N.Y.

11801, Bennett B. Harman, 220-55 46th Ave., Bayside, N.Y. 11361, and William Solomon, 46 Croley St.,

Huntington, N.Y. 11743 Filed Mar. 21, 1966, Ser. No. 536,136

Int. Cl. Eb 65/10, 45/12; E06c 15/02 U.S. Cl. 70-92 4 Claims ABSTRACT 0F THE DISCLOSURE An emergency door lock having integral alarm means permitting authorized personnel in possession of a key to open the door upon which the lock is installed without sounding the alarm, while permitting unauthorized personnel to open the same door in an emergency by sounding the alarm, which alarm cannot be disconnected by subsequently closing the door in the absence of possession of the key.

This invention relates generally to the field of door looks having alarm means incorporated as a self-contained component, and more particularly to an improved form of such `device particularly adapted Vfor use in conjunction with emergency door opening means.

Many warehouses and other large buildings are equipped with doors of a type `which open outwardly from the interior of the building in response to pressure exerted upon an actuating bar which serves to release the latching means holding the door in closed condition. The provision of structure of this class prevents persons from becoming trapped within a building upon the occurrence of panic incident to fire or other emergency, since the latching means may be tripped merely by the pressure of persons moving against the actuating bar, without the necessity of manual manipulation. In the prior art, it has been diicult to incorporate into such release means a warning device which will indicate unauthorized opening of an alarm door, particularly ywhere the door is already provided with self-opening means.

It is therefore among the principal objects of the present invention to provide an improved emergency door lock unit having self-contained battery powered alarm means.

Another object of the invention lies in the provision of an emergency door lock olf the class described which may be operated by means of pressure exerted against a tripper bar, the actuation of the bar serving to simultaneously actuate the alarm means.

A further object of the invention lies in the provision of an improved emergency door lock having alarm means incorporated therein in -which once the alarm means has been actuated, it will continue to sound after pressure upon the tripping bar has been released, thereby assuring the attendance of an authorized person for returning the alarm to inactive state, and the concomitant investigation which will be conducted by such person.

A lfurther object of the invention lies in the provision of an improved emergency door lock having alarm means possessed of the above advantages, in which the cost of fabrication may be of a reasonably low order, substantially lower than that of prior art devices of a similar type, with consequent Iwide sale, distribution and use.

Still another object of the invention lies in the provision of an improved emengency door lock of the class described Which may be opened by authorized persons without sounding the alarm means.

A feature of the disclosed embodiment lies in the unusually attractive appearance of the same.

3,435,643 Patented Apr. 1, 1969 Another feature of the embodiment lies in the fact that the self-contained battery may be periodically tested without dismantling the device, or tripping the alarm means.

These objects and features, as well as other incidental ends and advantages will more yfully appear in the progress of the Ifollowing disclosure, and be pointed out in the appended claims.

In the drawings, to |which reference lwill be made in the specification, similar reference characters have been employed to `designate corresponding parts throughout the several views.

FIGURE 1 is a View in perspective of an embodiment of the invention, showing the same in installed condition upon an emergency door.

FIGURE 2 is an enlarged fragmentary view in elevation of the embodiment with the cover element thereof removed.

FIGURE 3 is a horizontal sectional view as seen from the plane 3-3 in FIGURE 2.

'FIGUR-E 4 is a horizontal sectional view as seen from the plane 4-4 in FIGURE 2.

FIGURE 5 is a side elevational view thereof.

FIGURE 6 is a side elevational view thereof, showing the side opposite that seen in FIGURE 5.

FIGURE 7 is an elevational view of the inside of the cover element comprising a part of the embodiment.

FIGURE 8 is a schematic wiring diagram.

In accordance with the invention, the device, generally indicated by reference character 10, comprises broadly: a base element 11, a cover element 12, a lock mechanism 13, and alarm means 14.

The base element 11 includes a sheet steel plate 17 bounded by an inner surface 18, an outer surface 19, side edges 20 and 21, an upper edge 22 and a lower edge 23. Adjacent the side edges 20 and 21 are a plurality of angle brackets 24 upon which the cover element 12 is mounted.

A larger angle bracket 25 supports the alarm means 14,

The cover element 12 is generally rectangular in configuration, and includes a forward wall 32, side Walls 33 and 34, an upper wal] 35 and a lower wall 36. The forward wall 32 includes a grilled opening 37 which in installed condition overlies the alarm means 14, as well as an opening 38 for mounting a cylinder lock 39. The lock 39 is supported by a bracket 40` (see FIGURE 7) and mounts a rotating tongue member 41 which engages the lock mechanism 13, as will more fully appear hereinafter. Cutouts 42 and 43 provide openings for the outwardly extending portions of the lock mechanism 13.

The lock mechanism 13 includes a fixed latch member 44 which is mounted on the door jamb 45 of the opening in which the device is installed. Pivotally mounted between the plates 28 and 29 is a rotary latch member 47, movement of the same being coaxial with a mounting pintle 48. The configuration of the latch member 47 is best seen from a consideration of FIGURES 3 and 4, and the same includes a pair of side surfaces 49 and 50, a curved surface 51, as well as a planar surface 52. An enlarged rectangular portion 53 is positioned so as to overlie the cutout 42 to prevent jimmying through said opening when the cover element 12 is in installed position. Pintle engagement is by means of two bearing portions 54 which extend laterally from the main :body portion of the latch member. Disposed in the upper portion of the rectangular portion 53 is a locking notch 55 which extends transversely thereacross. A coil spring 56 is mounted on the pintle 48, the free end of which engages a pintle 58 which extends through a curved slot 59 in the plate 28 3 to resiliently urge the latch member 47 outwardly to the position shown in FIGURE 2.

Also mounted between the plates 28 and 29 is a rolling block member 61 having an axis of movement concentric with a supporting shaft 62. The member 61 includes a projection 63 selectively engageable within the notch 55, in which condition the latch member 47 is locked against movement from the position shown in FIGURE 2. The rolling block member 61 is resiliently urged for rotation to this position by a spring 64 which bears against a laterally extending portion 65.

Adjacent the portion 65 is an arcuate cam surface 66 having a notch 67 which cooperates with a roller 68 on a follower arm 69 which serves as an actuator for a precision switch 70. Disposed beneath the surface 66 is an arcuate slot 71 having a center of curvature at the axis of rotation of the member 61.

Also mounted on the shaft 62 is a member 73 having a radially extending portion 74, the outer periphery 75 of which is provided with first and second recesses 76 and 77 cooperating with a roller 78 on the follower arm 79 of a second precision switch 80. Extending laterally from the plane of the member 73 is a pintle 81, the free end of which is positioned within the arcuate slot 71 adjacent the lower end 82 thereof.

A manually engageable release bar 85 is mounted for pivotal movement upon a pintle 86, and is provided with a hooklike member 87 which engages the pintle 81 over one portion of its path of travel. The bar 85 is resiliently urged toward the remaining portion of its path of travel by a leaf spring 88.

Where it is desired that the device be operated from either side of the door (not shown) upon which it is mounted, there may be optionally provided a small `bracket 91 supporting an auxiliary tongue member 93 for rotation about the same axis as the tongue member 41. Keying means 43 is aligned with a bore 94 in the plate 17, the keying means connecting with a second tumbler lock (not shown) installed within a |bore in the door.

The alarm means 14 includes a pair of electrically powered horns 45a, although where desired, other means such as a clapper operated gong may be substituted. A third precision switch 96 is mounted on the plate 17 adjacent one of the brackets 24, so that upon removal of the screw 97 engaging said bracket, the switch 96 is opened. Thus, if any attempt is made to disarm the alarm means 14 by removing the cover element 12, the alarm will be sounded.

OPERATION When in operation, the door may be opened from a locked condition by rotating the cylinder of the lock 39, or by pressure upon the manual release bar 85. Operation of the lock 39 requires possession of a corresponding key by authorized personnel, and upon such rotation, the tongue member 41 is rotated to contact the laterally extending portion 65 to move the rolling block member 61 rightwardly as seen in FIGURE 2 a distance sufficient to clear the projection 63 from the notch 55. This movement will enable the spring 56 to rotate the latch member 47, thus disengaging the same from the xed latch member 44, and allowing the door to open. The door may be then closed by merely slamming the same, which motion will cause the latch member 47 to again engage the latch member 44, and the projection 63 to reenter the notch 55. If the rotation of the tongue member 41 has been sufficient to cause the roller 68 to enter the notch 67 in the cam surface 66, this engagement will be sufficient to overcome the resilient force of the spring 64, and to subsequently obtain locking, it will be necessary to rotate the tongue member 41 in an opposite direction whereby the opposite surface of the portion 65 is contacted to result in disengagement of the roller from the notch, following which .a similar locking action takes place.

During the course of either of the above procedures, the second precision switch 80 is maintained in an opened condition by-virtue of the engagement of the roller 78 within the first recess 76, so that should the first precision switch 70 reach a closed position by engagement of the roller 68 within the notch 67, the alarm means 14 is still not permitted to sound. This action may be repeated as often as is required without disturbing the position of the member 73, so long 4as the bar 85 is not moved. If it is desired to test the strength of the battery 27, the bar 85 may be lightly contacted, with a force sufficient to move the roller 78 out of the recess 76, thus permitting the switch to momentarily close. Immediate release of the bar will then return the roller 78 bo engagement with the first recess 76, the normal static condition.

In the case of emergency, the door may be opened by unauthorized persons only Iby pressing fully upon the bar 85 with sufficient force to dislodge the roller 78 from the first recess 76, following which it enters the second recess 77 which is of greater depth, so that the engagement closes the switch 80. Since the switch 70 is open in all conditions except that in which the roller 68 engages the notch 67, upon the closing of the switch 80 connected in series therewith, the alarm means 14 is sounded. This motion also causes the hook-like member 87 to engage the pintle 81, whereby not only the member 73 is shifted to the new position in which the roller 78 engages the recess 77, but the pintle engages the lower end 82 of the slot 71 to move the rolling block member 61 out of engagement with the latch member 47. However, when the bar 85 is released, the hook-like member 87 which does not surround the pintle 81 does not return the member 73 to its initial position, so that the alarm means continues to sound until the pintle 81 is returned to its initial condition by rotating the tongue member 41 which movement can only be performed by personnel possessing the key to operate the lock 39.

We wish it to be understood that we do not consider the invention limited to the precise details of structure shown and set forth in this specification, for obvious modifications will occur to those skilled in the art to which the invention pertains.

We claim:

.1. An emergency door lock having integral alarm means comprising: a base element mountable upon a swinging door adjacent a free edge tereof, fixed latching means mounted upon a door jamb adjacent said `free edge, a rotary latch member mounted for pivotal movement upon said base element and cooperating with said fixed latching means, a rolling block member mounted on said base element for rotation about an axis spaced and parallel to the axis of pivotal movement of said rotary latch member, and having means selectively engaging said rotary latch member to prevent rotation thereof when in engaged condition with respect to said fixed latching means, and resilient means normally urging said rolling block member into engaged relation with said rotary latch member; an alarm means actuator including first and second means for pivoting said rolling block member to disengaged position against the action of said resilient means, said first means requiring the operation of a key within a locking means, said actuator being located in the path of movement of said second means, whereby operation of the second means serves to actuate said alarm means.

2. Structure in accordance with claim 1, said alarm means including an electrically powered warning device, a source of electrical energy for energizing said warning device, and first and second switches connected in series between said source and said warning device; said first switch being normally in closed condition when said rolling block member is engaged with said rotary latch member, and in open condition only when said rolling Iblock member is rotated away from said rotary latch member to predetermined angular position; said second switch being in normally opened condition when said rolling block member is engaged with said rotary latch member, and in closed condition when said rolling block member is rotated to disengaged position relative to said rotary latch member by said second means.

3. Structure in accordance with claim 1, in which said rolling block member may be moved to said predetermined angular position by said rst means.

4. Structure in accordance with claim 1 in which said warning device, once actuated by said second means can be returned to deactivated condition only by operation of said rst means.

References Cited UNITED STATES PATENTS 6 1,435,971 11/1922 Mueller 292-216 x 2,922,150 1/1960 Jezi 20o-61.642( 3,038,436 6/1962 Stebbins 116-9 FOREIGN PATENTS 5 545,462 s/1957 Canada.

1,085,067 7/1960 Germany.

MARVIN A. CHAMPION7 Primary Examiner. 10 E. I. MCCARTHY, Assistant Examiner.

U.S. C1. X.R.

ZOO-61.64; 292-92; 116-9 

